Green Klean High Efficiency Replacement Vacuum Bags for Ridgid 3-4.5 gallon vacs, Dry Pickup WD4050/4070/4550/4522 (OEM# VF3501) 5/2 Packs GK-3501 Designed for cleanup of fine particles like drywall dust and other non-toxic dusts. Green Klean® Replacement vacuum bags use the highest quality Micro-Plus filter media. Designed specifically for industrial use, they are always equal to, or exceed OEM quality. Better filtration means cleaner air, less dusting, and longer secondary filter life. Each bag is printed to easily identify the vacuum it fits. Clean with Confidence, Replace with Green Klean.